1. Department of Physiology, Shihezi University Medical College, Shihezi, Xinjiang 832002, P.R. China
2. Department of Ultrasound, the First Affiliated Hospital of Shihezi University, Shihezi, Xinjiang 832002, P.R. China
3. Department of Cardiology, the First Affiliated Hospital of Shihezi University, Shihezi, Xinjiang 832002, P.R. China
4. Department of Physiology, Jiaxing University Medical College, Jiaxing, Zhejiang 314001, P.R. China